hausdorff: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On Debian possible default full paths are:

/usr/lib/cmtk/bin/hausdorff - from package: cmtk

You may install the required package with command apt-get install {package}

Error in other languages:
hausdorff: bevel nie gevind nie
hausdorff: comandă negăsită
hausdorff: comando não encontrado
hausdorff: commande introuvable
hausdorff: command not found
hausdorff: käsku ei ole
hausdorff: không tìm thấy lệnh
hausdorff: komanda nerasta
hausdorff: Kommando nicht gefunden.
hausdorff: kommandot finns inte
hausdorff: komut yok
hausdorff: nie znaleziono polecenia
hausdorff: níor aimsíodh an t-ordú
hausdorff: no se encontró la orden
hausdorff: no s'ha trobat l'ordre
hausdorff: opdracht niet gevonden
hausdorff: parancs nem található
hausdorff: perintah tidak ditemukan
hausdorff: príkaz nenájdený
hausdorff: příkaz nenalezen
hausdorff: команда не найдена
hausdorff: командата не е открита
hausdorff: 命令找不到
hausdorff: コマンドが見つかりません